In ground state, an element has 13 electrons in its M - shell. The element is:
Correct answer: D. Chromium
- A. Copper
- B. Iron
- C. Nickel
- D. Chromium
Explanation
The electron configuration of chromium is 1s2 2s2 2p6 3s2 3p6 4s1 3d5. In the ground state, chromium has 13 electrons in its M-shell (3s2 3p6 3d5), which matches the given information in the question. Therefore, the correct element is chromium.
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